Year	%
1989	33.65
1991	33.63
1993	36.64
1995	14.86
1999	33.51
2000	9.54
2001	9.28
2003	9.73
2004	6.03
2005	5.55
2006	5.35
2007	4.32
2008	4.27
2009	4.76
2010	5
2011	4.85
2013	6.06
2014	6.65
2015	6.86
2021	7.61